Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3aacbd4be1ac0fc…

MALICIOUS

PDF

33.5 KB Created: 2021-07-10 01:04:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 6f6d309436fe873ad0f3141c83d1fb85 SHA-1: 497093d03302bb46adbb3265637e21b1f147f21b SHA-256: c3aacbd4be1ac0fc5ff6ec9e56a0026265f465ca7f8be08830e179cd60f5cf42
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites that promise free in-game items and hacks, such as '100 Free Tiktok Likes' and 'Roblox free Robux'. These links are identified as malicious redirectors, indicating a phishing or malware distribution attempt. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/835599320/100-free-tiktok-likes-game-hack In PDF document text
    • http://elearning.manulasem.sch.id/__statics/gudangsoal/files/how-to-get-robux-in-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://elearning.manulasem.sch.id/__statics/gudangsoal/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.manulasem.sch.id/__statics/gudangsoal/files/free-private-server-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.manulasem.sch.id/__statics/gudangsoal/files/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.manulasem.sch.id/__statics/gudangsoal/files/coin-master-online-hack-no-survey-no-password_GM406889139.pdfIn PDF document text
    • http://elearning.manulasem.sch.id/__statics/gudangsoal/files/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://elearning.manulasem.sch.id/__statics/gudangsoal/files/army-roblox-free-play_GM431946152.pdfIn PDF document text
    • http://elearning.manulasem.sch.id/__statics/gudangsoal/files/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://elearning.manulasem.sch.id/__statics/gudangsoal/files/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • http://elearning.manulasem.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://elearning.manulasem.sch.id/__statics/gudangsoal/files/free-robux-real_GM431946152.pdfIn PDF document text
    • http://elearning.manulasem.sch.id/__statics/gudangsoal/files/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.manulasem.sch.id/__statics/gudangsoal/files/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://elearning.manulasem.sch.id/__statics/gudangsoal/files/roblox-phase-hack-2021_GM431946152.pdfIn PDF document text
    • http://elearning.manulasem.sch.id/__statics/gudangsoal/files/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://elearning.manulasem.sch.id/__statics/gudangsoal/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://elearning.manulasem.sch.id/__statics/gudangsoal/files/free-roblox-generatorcom-pc_GM431946152.pdfIn PDF document text
    • http://elearning.manulasem.sch.id/__statics/gudangsoal/files/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://elearning.manulasem.sch.id/__statics/gudangsoal/files/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.manulasem.sch.id/__statics/gudangsoal/files/freespins-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30CD 21544 bytes
SHA-256: c6fb722a536c7515cb3eee18ad1e3ab26688e361fcd961425617a4f0c959ff30
font_01_sfnt_off00006004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6004 18248 bytes
SHA-256: a036984e021f7c56bd5bf65a7f460c6dd33ae50afa388712e656488f5c190f10

Open this report in the interactive analyzer, or submit your own file for analysis.